<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator="/" separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
      <el-row>
        <el-col><el-button type="primary" @click="addRoles()">添加角色</el-button></el-col>
      </el-row>
      <el-table :data="rolesList" border stripe>
        <!-- 展开列的具体信息 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag closable type="success" @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                  </el-col>
                  <el-col :span='18'>
                    <el-tag type="warning" closable v-for="(item3) in item2.children" :key="item3.id"
                    @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" prop="level">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"

              size="mini" @click="showEditDialog(scope.row.id)"
            >编辑</el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"

              size="mini" @click="removeRoleById(scope.row.id)"
            >删除</el-button>
            <!-- 分配角色按钮 -->
              <el-button
                type="warning"
                icon="el-icon-setting"
                @click="showSetRightDialog(scope.row)"
                size="mini"
              >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog @close="setRightDialogClosed()"
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="30%">
      <el-tree
        :data="rightsList"
        show-checkbox
        default-expand-all :default-checked-keys="defKeys"
        node-key="id"
        ref="treeRef"
        highlight-current
        :props="treeProps">
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolesList: [],
      // 控制分配权限对话框显示与隐藏的对象
      setRightDialogVisible: false,
      // 所有权限的列表数据绑定对象
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选择的树节点的id值
      defKeys: [],
      // 当前积极分配权限的角色id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表数据
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
      }
      this.rolesList = res.data
      this.$message.success(res.meta.msg)
    },
    // 点击添加角色按钮，弹出添加角色对话框
    addRoles() {

    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否确定要删除相应的权限
      const confirmResult = await this.$confirm('此操作将永久删除该用户，是否继续？', '提示', { confirmButtonText: '确定', cancelButtonText: '取消', type: 'warning' }).catch(err => err)
      // 如果用户确认删除，则返回值为字符串confirm
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      console.log('确认了删除')
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
      }
      // this.getRolesList()
      role.children = res.data
      this.$message.success(res.meta.msg)
    },
    // 点击按钮，弹出分配权限对话框
    async showSetRightDialog(role) {
      // 获取所有的权限列表数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
      }
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      this.roleId = role.id
      this.setRightDialogVisible = true
    },
    // 通过递归的方式，获取角色下所有三级权限的id，并保存到defkeys数组中
    getLeafKeys(node, arr) {
      // 如果当前节点不包括children属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`, { rids: idStr }
      )
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;

}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
